199983517 has 2 divisors, whose sum is σ = 199983518. Its totient is φ = 199983516.

The previous prime is 199983491. The next prime is 199983541. The reversal of 199983517 is 715389991.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 102941316 + 97042201 = 10146^2 + 9851^2 .

It is a cyclic number.

It is not a de Polignac number, because 199983517 - 2⁷ = 199983389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (199983547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99991758 + 99991759.

It is an arithmetic number, because the mean of its divisors is an integer number (99991759).

Almost surely, 2^199983517 is an apocalyptic number.

It is an amenable number.

199983517 is a deficient number, since it is larger than the sum of its proper divisors (1).

199983517 is an equidigital number, since it uses as much as digits as its factorization.

199983517 is an evil number, because the sum of its binary digits is even.

The product of its digits is 612360, while the sum is 52.

The square root of 199983517 is about 14141.5528496697. The cubic root of 199983517 is about 584.7874816731.

The spelling of 199983517 in words is "one hundred ninety-nine million, nine hundred eighty-three thousand, five hundred seventeen".